How to enable collection analysis charts
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Prerequisites
- Access to the Configuration > General parameters (SP019) menu.
- Access to the Management > Collection planning (SP003) menu or to the Management > Collection tracking (SP004) menu.
- Planned collection.
Introduction
It is possible to configure charts to be displayed during the execution of a data collection, so that it is possible to analyze collected data on variable and attribute characteristics.
To this end, the system allows for defining the number of rows and columns into which the screen will be divided, as well as which charts will appear in each space that is created.
First, however, it is important to learn about the rules for enabling each type of chart, which are divided into variable and attribute rules.
Enabling variable characteristic charts
The following rules need to be met in order for the variable characteristic charts to be enabled:
| Evaluation ranges | There must be at least one evaluation range configured in the characteristic, as well as a reading that fits into the range. |
| Average and range | The characteristic needs to be configured with two readings or more and have at least two samples filled out. |
| Individual values and moving range | The characteristic needs to be configured with one reading and have at least two samples filled out. |
| Average and standard deviation | The characteristic needs to be configured with two readings or more and have at least two samples filled out. |
| Stoplight chart | The characteristic needs to be configured with at least one evaluation range and have at least two samples filled out. |
| Histogram | There must be at least two samples filled out, and the standard deviation must be different from zero. |
| Box-plot chart | There must be at least two samples filled out. |
Enabling attribute characteristic charts
The following rules need to be met in order for attribute characteristic charts to be enabled:
| P chart | To start using the P chart, it is necessary to have at least two samples filled out. This chart evaluates the defective fraction, represented by the number of defective items divided by the total quantity of that sample. |
| Np chart | There must be at least two samples filled out for the Np chart to be used. This chart registers the number of defective items in each sample. |
| C chart | To start using the C chart, it is necessary to have at least two samples filled out. This chart registers the number of defects in each sample. |
| U chart | There must be at least two samples filled out for the U chart to be used. This chart evaluates the number of defects per unit. |
| Pareto of defects | For the Pareto of defects, it is necessary to configure at least one defect in the characteristic under analysis. Moreover, it is necessary to have at least two entered samples in which the defect is recorded. |
Conclusion
It is possible to configure a chart for all data collections, as well as a specific chart for a particular system collection. See the instructions for each case in the Configuring collection analysis charts.